Is Goblins free for teachers?

Yes. Goblins offers a generous free tier that includes 1 live feedback assignment per week, insights on student mastery and replays, and the ability to upload your own content. The Max plan adds unlimited assignments, superadaptive mode, grade exports, standards growth reports, and SSO/LMS integration, with per-student pricing for schools and districts.

How does Goblins work?

Three simple steps: (1) Share an assignment from thousands of standards-aligned topics using a share code. (2) Students speak and draw their thinking naturally, and Goblins responds with Socratic questioning that sounds just like their teacher. (3) Teachers get real-time formative insights showing what students struggle with and suggestions to inform instruction.

Does Goblins prevent cheating?

Yes. Goblins uses a purpose-trained AI model that evaluates cheating signals in real time. It can detect when students are copying answers, using external tools inappropriately, or not genuinely working through problems. Copy-pasting answers is also blocked.

Can I use my own voice with Goblins?

Yes. Teachers can record their voice and take a selfie to create a custom 3D avatar in about 30 seconds. Students then hear help in their own teacher's voice and see a familiar face, making the experience more personal and effective.

What math levels does Goblins cover?

Goblins covers math from Grade 5 through AP Calculus, including thousands of standards-aligned topics. Teachers can also upload their own content for custom assignments at any level.

Is Goblins FERPA compliant?

Yes. Goblins is FERPA and state compliant. Student data privacy and security are a top priority.

Does Goblins support English Language Learners?

Yes. Goblins supports 30+ languages so teachers don't have to translate every worksheet. It is especially helpful for ELL students who need accessible math instruction in their native language.

5.NF.B.4.b

Find the area of a rectangle with fractional side lengths by tiling it with unit squares of the appropriate unit fraction side lengths, and show that the area is the same as would be found by multiplying the side lengths. Multiply fractional side lengths to find areas of rectangles and represent fraction products as rectangular areas.

Example Problems

Multiply:

\frac{4}{5} \times \frac{3}{9} =

Multiply:

\frac{8}{3} \times \frac{3}{10} =

Multiply:

\frac{3}{5} \times \frac{5}{7} =

Khan Academy Resources

Area of parallelograms Area of triangles Area of parallelograms Area of triangles Find missing length when given area of a triangle Represent fraction multiplication with visuals Multiplying fractions with visuals Multiply fractions and whole numbers word problems Area of right triangles Multiply fractions and whole numbers visually Find missing length when given area of a parallelogram Multiply fractions and whole numbers Decompose area with triangles Area of composite shapes Interpret multiplying fraction and whole number word problems Find base and height on a triangle Area of a triangle Finding area by rearranging parts Multiplying unit fractions and whole numbers Multiplying fractions word problem: movies Area of a parallelogram Multiplying 2 fractions: fraction model Area of composite shapes Multiplying fractions and whole numbers visually Multiplying fractions word problem: milk Finding area with fractional sides 1 Finding area with fractional sides 2 Multiplying 2 fractions: number line Multiplying fractions and whole numbers Multiplying fractions by whole numbers on a number line Area of quadrilateral with 2 parallel sides

1-on-1 AI tutoring aligned to 5.NF.B.4.b. Instant help for students, real-time insights for teachers.

Used in classrooms by 100,000+ students at Baltimore County, Plano ISD, Deer Valley USD, KIPP, and districts nationwide.

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